Device for timely opening and closing of the flap of fountain pens



DEVICE Fon TIIELY OPENING AND 'cLosrn or' THE mi' or romani! fils Dec..423, 1930. R. P. MARKsrI-:IN

Pneu nec. 4. i929 1,. Patented Dec. 23, 1930 UNITED' STATES PATENToEFicE DEVICE :FORl TIMELY OPENING AND CLOSING F THE FLAI OF FOUNTAINPENS Application led December 4, 1929, Serial No. 411,604, and in.Austria October 24, 1929.

the fountain pen and alsoneeds considerabler space in which to operate.

rIhe object of this invention is to provide an improved fountainconstructed to overcome these defects and in which the operating meniberdirectly acting on the closure flap is temporarily coupled by means of ayieldable stop to a part of the fountain pen barrel on which theprotecting sleeve carrying the flap is slidable, so that theoperating-member is caused to actuate the lap or closure.

With the above and other objects in view,

the invention consists in the construction,

combination and arrangement of devices 25 hereinafter described andlclaimed.

In the accompanying drawings Figure l is a longitudinal section of thefront portion of a fountain pen embodying my improvements.

Figure 2 is an elevation of the .guideway provided with a yieldable stopin accordance with one form of the invention.

Figure 3 is a sectional View of the same, also showing the operating rodand its stop device. v

Fig and 5 are Views similar to Figures 2 and 8, showing slight-lydifferent forms of the stop devices. The fountain pen here shown carriesslidably mounted on its barrel 1 a protection sleeve 2 having a flap 3for closing the exit opening'for the pen. An operating rod 4 is pivotedto a point of the lap spaced lfrom its hinge and said rod has areenforcement forming a stop device 5 tapering upwardly and downwardlyand extending into a guide provided on the barrel. This guide ispreferabiy a tube of sliglitdiameter having a spring tongue 7, whichtongue projects into the tube. By sliding the sleeve 2 downwardly onbarrel 1 to make the writing pen ready for writing, the reenforcementstop device 5 meets the spring tongue 7 and therebyencounters frictionalyielding resistance, which causes the lla 3 to be'opened by the rodbefore it is reac ed by the writing pen. After the flap has beencompletely opened, the reenforcement stop 5 overcomes the resistance ofthe 'tongue 7 and passes beyond said tongue into the lower portion ofthe guide in which the reenforcement stop 5 is freely slidable.

When sliding the slotted protection sleeve 2 again upwards, that is,when returning the writing pen into the protecting sleeve 2, thereenforcement stop 5 moves at first upwardly in the guide 6 untilitabuts against the tongue 7, and by reason of the resistance encounteredthereby, the Hap 3 is closed after the writing pen has completelyentered the protecting sleeve 2. Finally the reenforcement stop 5 passesbeyond the ton ue 7 to reach the end position indicated in ull lines inFigure l; Instead of the spring tongue 7, a bridge 9 can be provided inthe guide tube which is pressed inwardly between two separating slots 8(Figure 4C). I

Furthermore, the reenforcement 5 can be made yieldable by means of slotsin which case the guide 6 1s narrowed near its upper end at l0, as shownin Figure 5.

While I have herein shown and described several forms of my invention, Iwould have it understood that further changes may he made in the form,proportion and construction of the several parts within the scope of myinvention as defined in the appended claims.

What I claim is:

1. A pen barrel, a protecting sleeve for the pen slidable on the barreland having a pivoted closure at its outer end, an operating rod for theclosure, and coacting means, on the barrel and on the rod, totemporarily resist relative movement between the sleeve and the barreland thereby cause the rod to operate the closure.

2. Apparatus as claimed in `claim 1, in which the coacting means arestop devices, one of which is yield'able to resist but yet permit thepassage of the other.

3. A pen barrel having a guideway, a rotecting sleeve for the pensldable on the arrel and having a pivoted closure at its outer end, an oerating rod for the closure movable longitudlnally in the guildeway, andcoacting means on the rod and in the guideway, to temporarily resistmovement of the rod in the guideway and thereby cause the rod to 0peratethe closure.

4. Apparatus as claimed in claim 3, in which the coacting means are stopdevices one of which is yieldable to resist but yet permit the passageof the other.

In witness whereof I aix m si ature.

ROBERT PETERr MA `K TEIN.

